:root{--book-header-height:70px;--book-toc-width:500px;--book-content-max-width:1200px;--book-spacing:2rem;--book-bg:#ffffff;--book-text:#2c3e50;--book-header-bg:#f8f9fa;--book-header-text:#2c3e50;--book-toc-bg:#ffffff;--book-toc-border:#dee2e6;--book-link:#3498db;--book-link-hover:#2980b9;--book-border:#e1e4e8;--book-shadow:rgba(0, 0, 0, 0.1)}.theme-dark,.theme-dark body{--book-bg:rgb(51, 51, 51);--book-text:#ffffff;--book-header-bg:#1a1a1a;--book-header-text:#ffffff;--book-toc-bg:#2a2a2a;--book-toc-border:#3a3a3a;--book-link:#58a6ff;--book-link-hover:#79c0ff;--book-border:#2a2a2a;--book-shadow:rgba(0, 0, 0, 0.6)}body.book-reader{background:var(--book-bg);color:var(--book-text);margin:0;padding:0;transition:background-color .3s ease,color .3s ease}.theme-dark body.book-reader,.theme-dark .chapter-body,.theme-dark .chapter-body p,.theme-dark .chapter-body 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